A core sample for this study was taken from the sulfide ore of the Geco Mine. The subsequent research was based on the assumption that a part of the scattering of strength-grade data could be correlated with variations in the chemical and/or mineralogical compositions of the samples. The results demonstrate clear relationships between strengths in tension and compression and the zinc-iron contents of the rocks.

A brief description of Inco's ORC copper refinery tank-house and the electrowinning tankhouse is followed by a comparison of the requirements for the production of the high-quality copper in both systems. The description will focus on both tankhouses, with emphasis on experience to date in the electrowinning tankhouse. Particular attention will be paid to sensitivities of each tankhouse to process upsets which can significantly affect the quality of the product cathodes.

Anode casting has been in operation for two years in Hudson Bay Mining and Smelting's Flin Flon smelter. The new plant allows all casting to be done on one shift and_ so achieves considerable labour savings. The equipment and operations are described. Some important features are as follows: very consistent anode weights by the use of the load-cell controlled casting ladle; excellent mold life; very low reject rate; and trouble-free take-off tower. Some of the start-up problems are described...

Approximately two-thirds of the annual 210,000 tons of copper refined by AMAX Inc. at the United States Metals Refining Company in Carteret, New Jersey, comes from a wide variety of copper scrap ranging from low-grade smelter scrap to wirebar-grade material. The equipment and methods used to effect such large-scale metal recycling in an urban area and the measures taken to collect and recover metal values from smelter and refinery byproducts while protecting the environment from pollution are...

A concise historical review is given of the Overpelt plant and the general principles of zinc hydrometallurgy are briefly outlined, together with a description of the new electrolytic zinc plant ore roasting process and, more particularly, the original Overpelt roasting process.A detailed description of the flowsheet of the zinc elec-trowinning plant, with an annual capacity of 100,000 t, successfully put into operation in May 1974, is given. The treatment of the residues is performed...

Rock samples were taken, away from zones of mineralization, from seven sections of five rhyolitic zones as defined by Spence (1967) in the Noranda area. The purpose of the investigation was to test whether there were intrinsic differences between the zones which would differentiate between non-productive zones and productive zones. For the elements sought (major elements, Cu, Pb, Zn and S), no clear chemical difference between the zones was found. Thus, identification of a favourable zone...

Canada's only current tungsten producer started up in 1962 with a small open-pit mine on the Flat River, 130 air miles north of Watson Lake, Yukon Territory. The orebody was in a contact-metamorphic skarn zone and contained about 1.5 million tons of ore grading an estimated 247% W03 and 0.5% copper. Near the end of the open pit, a new zone was discovered on the lower limb of the same structure, and the decision to go underground was made in 1972The new "E Zone" contains over k -million tons...

World mineral production is dominated by six countries — the U.S., the U.S.S.R., Canada, South Africa, Australia and China — which also hold most of the reserves of the world's minerals. For the developed and centrally planned countries, there is a strong positive correlation between the mineral production of a country and its land area; there is no correlation between mineral production and land area for the less-developed countries. These facts imply that, after taking due account of...

Inco Limited is an integrated mining, smelting, refining and manufacturing company with operations located worldwide. The Ontario Division operations consist of 13 mines and 10 processing facilities located in Sudbury, Port Colborne and Shebandowan.The scope of our utilization of energy in the Ontario Division in 1976 included in excess of 2,2 billion kilowatt hours of electric power, 12 billion cubic feet of natural gas, 60 million Imperial gallons of residual oil and smaller quantities of...